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TL1431QLPR Datasheet(PDF) 4 Page - Texas Instruments |
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TL1431QLPR Datasheet(HTML) 4 Page - Texas Instruments |
4 / 32 page ∆I ∆V |z'| = R2 R1 |z | KA (1 + ( ∆I KA ∆V KA |z | = KA where: ∆TA is the rated operating temperature range of the device. Max VI(ref) Min VI(ref) ˙TA VI(dev) α VI(ref) ppm °C V I(dev) V I(ref) at 25 °C × 10 6 T A ( ( = ( ( ∆V KA ∆V I(ref) (3) The output impedance is defined as: , which is approximately equal to . TL1431 SLVS062M – DECEMBER 1991 – REVISED APRIL 2012 www.ti.com Recommended Operating Conditions MIN MAX UNIT VKA Cathode voltage VI(ref) 36 V IKA Cathode current 1 100 mA TL1431C 0 70 TA Operating free-air temperature TL1431Q –40 125 °C TL1431M –55 125 Electrical Characteristics at specified free-air temperature, IKA = 10 mA (unless otherwise noted) TL1431C TEST PARAMETER TEST CONDITIONS TA (1) UNIT CIRCUIT MIN TYP MAX 25°C 2490 2500 2510 VI(ref) Reference input voltage VKA = VI(ref) Figure 1 mV Full range 2480 2520 Deviation of reference input VI(dev) voltage over full temperature VKA = VI(ref) Full range Figure 1 4 20 mV range(2) Ratio of change in reference input voltage to the change in ΔVKA = 3 V to 36 V Full range Figure 2 –1.1 –2 mV/V cathode voltage 25°C 1.5 2.5 II(ref) Reference input current R1 = 10 k Ω, R2 = ∞ Figure 2 μA Full range 3 Deviation of reference input II(dev) current over full temperature R1 = 10 k Ω, R2 = ∞ Full range Figure 2 0.2 1.2 μA range(2) Minimum cathode current for Imin VKA = VI(ref) 25°C Figure 1 0.45 1 mA regulation 25°C 0.18 0.5 Ioff Off-state cathode current VKA = 36 V, VI(ref) = 0 Figure 3 μA Full range 2 VKA = VI(ref), f ≤ 1 kHz, |zKA| Output impedance(3) 25°C Figure 1 0.2 0.4 Ω IKA = 1 mA to 100 mA (1) Full range is 0°C to 70°C for C-suffix devices. (2) The deviation parameters VI(dev) and II(dev) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage αVI(ref) is defined as: αVI(ref) is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature. When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by: 4 Submit Documentation Feedback Copyright © 1991–2012, Texas Instruments Incorporated Product Folder Links: TL1431 |
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